How to Operate a Harrington CB020 2 Ton Hand Chain Hoist

Face the hand chain wheel, pull the hand chain clockwise to raise the load, and pull counterclockwise to lower it. The condition attached to that sequence is the pawl: on every raise you have to hear it click into the ratchet disc, and Harrington's CB manual lists a missing click as a load-drop warning, not as the quirk of a worn unit. That, in one paragraph, is how you operate a Harrington CB020 2 ton hand chain hoist.

What follows is the part most operators skip: what the pre-lift check has to clear, why 72 pounds of pull can move two tons, and where this model's numbers stop applying.

What the Pre-Lift Check Must Cover First

Rated capacity is the first thing to confirm, and it is not the hoist's capacity you check first. Confirm the adequacy of the rated capacity for every sling, chain, wire rope and other lifting attachment in the rig before use. A 2 ton hoist hanging above a sling rated below the load has not made the lift safer; it has moved the failure point off the hoist and onto the sling, and the load comes down either way.

Then the suspension members. Inspect all load suspension members for damage before use and replace or repair anything damaged, and verify and correct every chain irregularity before the hoist goes into service. The same section also calls for measuring and recording the k dimension on every hook. That one is a lookup, not a guess: if your copy of the manual does not show how the k dimension is measured on that hook, treat it as an open question rather than recording a number that sounds about right.

Installation and fasteners come next. The hoist has to be properly installed to a fixed point, and every nut, bolt and split pin has to be sufficiently fastened before you load it. Both are static items: nothing about them changes until load arrives.

Two more items close the list. The hoist has to meet the inspection, testing and maintenance requirements of ANSI/ASME B30.16 as the manual states them, and you read and become familiar with the operation section before you run the unit. Confirm too that nothing will interfere with the full range of the hoist's operation, meaning the whole travel path and not just the height you start from.

Why 72 Pounds of Hand Pull Moves 2 Tons

The CB020 row in the specification table lists 72 pounds of pull to lift the rated load, and the rated load is 2 tons. Those two figures sit next to each other and look impossible until you look at what actually carries the load. The load chain is a single 8 mm fall. One chain, no reeving, so the whole 2 tons hangs on that one strand, and there is nowhere for the force to be divided.

The reason a person can then move it comes down to distance. A hand chain hoist is a lever with the effort arm wrapped around a wheel: the hand chain pays out a long travel so the load rises a short one. Work in equals work out, and work is force times distance, so trading travel for lift is the only way a pair of hands raises two tons. That is the entire trick, and it is the trade every lever and every set of blocks makes.

Which means your hands are not measuring the load. They are measuring the gear train plus friction, not the weight on the hook. A 2 ton load that feels light and a 2 ton load that feels heavy on the same hoist are the same load; what changed is how freely the chain runs and how fast you are pulling. Effort is not an overload test. The rating, the rig and the sound of the pawl are.

The same row also lists an overhaul ratio of 70 for this model. The manual defines that figure, so treat it as a spec to look up, not a number to drop into a formula of your own.

Stand on the Hand Wheel Side, Pull Clockwise

Position decides direction. The operation passage is three lines: face the hand chain wheel side of the hoist, pull the hand chain clockwise to raise the load, pull counterclockwise to lower it. Notice what that locks in. Clockwise and counterclockwise are anchored to where you stand relative to the hand wheel, not to the room, so from any other angle those two words stop describing what your hands should do. That is why the sequence starts with facing the wheel and not with pulling.

So plant yourself first. Pick a spot facing the hand wheel, confirm the chain path is clear in both directions, and start from there. Operators who drift sideways while watching the load are hauling a chain whose direction they can no longer predict.

Harrington adds a note in that same passage: two operators are required for the 20 ton CB200 unit. That is a different model in the same manual. It does not put a two-person requirement on the CB020, and it does not make single-operator practice acceptable on a 20 ton unit either.

The Click That Proves the Load Is Held

Listen for the click.

That sound is the pawl dropping into the ratchet disc, and the warning is blunt about it: to prevent a load drop, the clicking sound of the pawl engaging the ratchet disc must be present when a load is being raised. The pawl is the part that stops the hand chain wheel from running backwards under load, so the click is not decoration and not a general sign of good health. It is the audible proof that the one mechanism holding two tons off the floor has engaged, one tooth at a time, on this pull and on the next hundred.

Which means the check is never whether the load moved. A load can rise on a pawl that is barely engaged, and it can hang there looking settled while you walk away. The check is that you heard the engagement, all the way through the raise.

No click, no lift. If you do not hear it, the raise stops there and the unit goes back to the manual before anything else goes up.

Where Each Step Usually Goes Wrong

Not every item on that list carries the same weight, and it pays to know which three do. Chain condition leads, because the load chain is the single 8 mm strand carrying the entire rated load, so a nick, a twist or a damaged link is not a cosmetic finding. It is the only element between the hook and the floor.

The pawl is second, for a reason that has nothing to do with it being less important: the only evidence it gives you is the sound, which means a lift run in a noisy aisle with a radio going is a lift where the pawl was never checked at all.

Suspension connections are third. Nuts, bolts, split pins and the fixed point stay static until load arrives, and then they are the parts that either hold or let go. That is why they get confirmed before the load instead of after the first sign of movement.

Everything else on the pre-operational list still matters: rigging capacity, the k dimension on the hooks, the ANSI/ASME B30.16 inspection status, clearance through the full range of travel. Those are checks you run once against paper and geometry. The three above are checks you run again on every lift, which is what makes them the ones that get skipped when the shift is behind.

A Low Trial Lift Before the Real One

Suppose a maintenance tech has a load on the floor, the checklist signed, and one shot at a clean lift before the shift backs up. The manual's own heading pairs preoperational checks with trial operation, which is the opening to run the signals together on a short first travel. Up a few inches, did the pawl click? Did the load chain run straight without a jump or a snatch? Did anything touch the chain, the hook block or the hand chain through the travel just used?

The point is not the height. It is that a failed signal at six inches costs a re-check, while the same failed signal at working height costs a dropped load. Nothing in a trial lift tests anything the manual does not already require; it just moves the listening to a moment when being wrong is cheap.

If one of those signals is off, the answer is not a slower pull or a second hand steadying the chain. It is to stop, find the item in the manual, and settle it before the load leaves the floor. A trial lift that gets waved through is worse than no trial lift, because now you have a signature on the sheet and a load in the air.

Where This 2 Ton Guidance Stops

Every figure here belongs to one model. The Harrington CB020 is rated 2 tons with a standard lift of 8 feet, a pull to lift the load of 72 pounds, a load chain of 8 mm in a single fall, a net weight of 41 pounds, a shipping weight of 43 pounds, and roughly 1.6 pounds of extra weight for each additional foot of lift. Change the model and any one of those can change with it.

Do not carry the reasoning across to the rest of the line. A smaller unit in the same family has its own pull figure and its own chain size, and the effort you feel on one tells you nothing about the other. Do not carry it across to another brand either, where the reeving, the pawl design and the gear train can all differ.

The two-operator note stays with the 20 ton CB200. Reading it as a rule for the CB020 overstates this hoist; ignoring it on a CB200 understates that one. ANSI/ASME B30.16 is the inspection, testing and maintenance standard the manual tells you your hoist has to meet, and it is not a certification stamped on any individual unit in your rack.

One caution for the paperwork side. The manual's specification tables use merged cells, so a re-typed copy taped to a shop wall can lose the header-to-row mapping that makes the numbers mean anything. Keep the PDF or printed original as the reference.

Do This Before the Next Load Goes Up

Before your next real lift, raise the empty hook a short distance and listen for the click on the way up. If it is there, you have confirmed the pawl on this unit for this shift. If it is not, open the manual at Section 5, Inspection, and work through Table 5-4 on that hoist's status before anything goes on the hook.

Sequence matters here. The empty-hook check is the free one, so it goes first; the manual lookup happens only if the click is missing, and the load stays off the hook until that question is settled.